CN213263238U

CN213263238U - Paperboard and display packaging box

Info

Publication number: CN213263238U
Application number: CN202021600600.9U
Authority: CN
Inventors: 李乐辉; 覃玲; 邬晓冬
Original assignee: Shenzhen Nine Stars Printing and Packaging Group Co Ltd
Current assignee: Shenzhen Nine Stars Printing and Packaging Group Co Ltd
Priority date: 2020-08-05
Filing date: 2020-08-05
Publication date: 2021-05-25
Anticipated expiration: 2030-08-05

Abstract

The utility model relates to a cardboard and show packing carton, wherein, the cardboard includes folded sheet, backplate, lower folded sheet and flank, the one end of backplate with the folded sheet is connected, the other end of backplate with the folded sheet is connected down, the flank includes first flank, second flank, third flank and fourth flank, first flank with the second flank is located respectively the folded sheet with the relative both sides of backplate link, the third flank with the fourth flank is located respectively the lower folded sheet with the relative both sides of backplate link; above-mentioned cardboard, folding plate, backplate, lower folding plate and flank integrated into one piece on it can be directly through simple folding formation show packing carton, and the show packing carton after folding has higher stability under the support of flank, utilizes the small-size show packing carton of above-mentioned cardboard preparation, stable in structure, low cost, and product environmental protection.

Description

Paperboard and display packaging box

Technical Field

The utility model relates to a packing carton structural design technical field especially relates to cardboard and show packing carton.

Background

Small-size packing carton generally adopts opaque paper material to make, consequently does not possess the bandwagon effect, and some packing cartons are through windowing on the packing carton for realizing the bandwagon effect to realize at the peripheral transparent PVC piece of silk screen printing glue laminating of window, this mode need increase processes such as silk screen printing glue, laminating PVC piece, causes the increase of cost, and on the other hand, because the PVC material is nondegradable, leads to small-size show packing carton feature to reduce.

SUMMERY OF THE UTILITY MODEL

Accordingly, there is a need to provide a paperboard and a display packaging box, which can solve the problems of multiple production processes, high cost and environmental pollution.

A paper plate is used for assembling and forming a display packaging box and comprises an upper folding plate, a back plate, a lower folding plate and side wings, wherein one end of the back plate is connected with the upper folding plate, the other end of the back plate is connected with the lower folding plate, each side wing comprises a first side wing, a second side wing, a third side wing and a fourth side wing, the first side wing and the second side wing are respectively arranged on two opposite sides of the connecting end of the upper folding plate and the back plate, and the third side wing and the fourth side wing are respectively arranged on two opposite sides of the connecting end of the lower folding plate and the back plate;

the upper folding plate and the back plate can be folded into an upper cavity, the lower folding plate and the back plate can be folded into a lower cavity, after folding, the first side wing and the second side wing respectively cover two ends of the upper cavity, the third side wing and the fourth side wing respectively cover two ends of the lower cavity, and a preset distance is reserved between the upper cavity and the lower cavity.

In one embodiment, the upper folding panel comprises a first flap, a second flap, and a third flap connected in series, the first flap being connected to the back panel.

In one embodiment, the foldable box further comprises a fourth folded plate and an insertion tongue, wherein the fourth folded plate is connected with one side of the third folded plate far away from the second folded plate, and the insertion tongue is arranged on one side of the fourth folded plate far away from the third folded plate.

In one embodiment, the lower folding plate includes a first connecting plate, a second connecting plate and a third connecting plate connected in sequence, and the first connecting plate is connected with the back plate.

In one embodiment, the connecting device further comprises a fourth connecting plate and a fifth connecting plate, the fourth connecting plate is connected with one side of the third connecting plate, which is far away from the second connecting plate, and the fifth connecting plate is connected with one side of the fourth connecting plate, which is far away from the third connecting plate.

In one embodiment, the fourth connecting plate further includes an auxiliary adhesive portion and a supporting portion.

In one embodiment, the third folding plate is provided with a plurality of first fixing portions, the third connecting plate is provided with a plurality of second fixing portions, and after the folding, the first fixing portions correspond to the second fixing portions in position and quantity.

Above-mentioned cardboard, folding plate, backplate, lower folding plate and flank integrated into one piece on it can be directly through simple folding formation show packing carton, and the show packing carton after folding has higher stability under the support of flank, utilizes the small-size show packing carton of above-mentioned cardboard preparation, stable in structure, low cost, and product environmental protection.

A display package, comprising:

a back plate;

the upper cavity is formed by encircling the back plate and an upper folding plate, the upper folding plate comprises a first folded plate, a second folded plate and a third folded plate which are sequentially connected, and the first folded plate is connected with the back plate;

the lower cavity is formed by encircling the back plate and a lower folding plate, the lower folding plate comprises a first connecting plate, a second connecting plate and a third connecting plate which are sequentially connected, the first connecting plate is connected with the back plate, and a preset distance is reserved between the upper cavity and the lower cavity; and

the side wings comprise a first side wing, a second side wing, a third side wing and a fourth side wing, the first side wing and the second side wing respectively cover two ends of the upper cavity, and the third side wing and the fourth side wing respectively cover two ends of the lower cavity.

In one embodiment, the foldable table further comprises a fourth folded plate and an insertion tongue, the fourth folded plate is connected with one side of the third folded plate, which is far away from the second folded plate, the insertion tongue is arranged on one side of the fourth folded plate, which is far away from the third folded plate, and the insertion tongue is connected with the lower cavity.

Above-mentioned show packing carton, backplate, upper chamber body, lower cavity and flank are folded by integrated into one piece's paper material and are made, stable in structure, low cost, and the material environmental protection.

Drawings

FIG. 1 is a schematic view of a paperboard construction of one embodiment;

FIG. 2 is a front view of the blank of FIG. 1 folded into a display package blank;

FIG. 3 is a right side view of the blank of FIG. 1 folded into a display package blank;

FIG. 4 is a schematic view of another embodiment of a paperboard construction;

FIG. 5 is a front view of the blank of FIG. 4 folded into a display package blank;

FIG. 6 is a right side view of the blank of FIG. 4 folded into a display package blank;

FIG. 7 is a schematic view of the lower cavity of the blank of FIG. 4 folded into a blank display package;

FIG. 8 is a front view of the blank of FIG. 4 folded into a finished display package;

fig. 9 is a perspective view of the needle product shown in fig. 4 folded into a display package.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" or "in communication with" another element, it can be directly connected to the other element or intervening elements may also be present. The terms "upper", "lower", "vertical", "horizontal", "left", "right" and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1, one embodiment of the paperboard includes an upper folding plate 10, a back plate 20, a lower folding plate 30 and side wings 40.

The upper folding plate 10 is provided with a plurality of folding lines, and the upper folding plate can be folded to form the upper cavity 1 through the plurality of folding lines.

Specifically, the upper folding plate 10 is provided with a first flap 110, a second flap 120 and a third flap 130 which are sequentially arranged, and a fold line 1101, a fold line 1102, a fold line 1301 and a fold line 1302 which are sequentially arranged are arranged in parallel, one side of the first flap 110 is connected with the back plate 20 through the fold line 1101, the second flap 120 is connected with one side of the first flap 110 away from the back plate 20 through the fold line 1102, and the third flap 130 is connected with one side of the second flap 120 away from the first flap 110 through the fold line 1301. The upper folding plate 10 can be folded around the folding line 1301, the folding line 1102 and the folding line 1101, and forms an upper cavity 1 together with a part of the back plate 20.

In the illustrated embodiment, the side edge of the third folding plate 130 is further symmetrically provided with a tongue 131 and a tongue 132, the tongue 131 is connected to one side edge of the third folding plate 130 by a folding line 1303, and the tongue 132 is connected to the other side edge of the third folding plate 130 by a folding line 1304. By arranging the inserting tongue 131 and the inserting tongue 132, the sealing effect of the upper cavity of the paperboard is better after the paperboard is folded into the display packaging box.

In some embodiments, referring to fig. 4, a fourth folding plate 140 is further disposed on a side of the third folding plate 130 away from the second folding plate 120, an insertion tongue 141 is further disposed on a side of the fourth folding plate 140 away from the third folding plate 130, and the fourth folding plate 140 is connected to the third folding plate 130 through a folding line 1302, when the fourth folding plate 140 is folded, the fourth folding plate 140 extends along the back plate 20 toward the lower cavity 3 and is inserted into the lower cavity 3 through the insertion tongue 141, and by disposing the fourth folding plate 140 and the insertion tongue 141, the back plate 20 and the upper cavity 1 of the carton after being folded into the display package have more structural stability.

In the illustrated embodiment, the third folding panel 130 is further provided with a plurality of first fixing portions 133 for fixing the upper end of the display article 50.

The first fixing portion 133 may be a circle, a square, an ellipse, a star, or any other shape as long as it can fix the upper end of the display article 50 in a snap-fit manner.

And a back plate 20 connected to the upper folding plate 10 and the lower folding plate 30, respectively, and folded to connect the upper cavity 1 and the lower cavity 3 together.

Specifically, one side of the back panel 20 is connected to the upper folding plate 10 by a folding line 1101, the opposite side thereof is connected to the lower folding plate 30 by a folding line 3101, and the length of the back panel 20 is greater than the sum of the lengths of the second flap 120 and the second connecting plate 320, so that a predetermined distance is left between the upper cavity 1 and the lower cavity 3 after the paperboard is folded into the display pack, thereby forming the display part 2.

The lower folding plate 30 is provided with a plurality of folding lines, and the lower cavity 3 can be formed by folding the folding lines.

Specifically, the lower folding plate 30 further includes a first connecting plate 310, a second connecting plate 320 and a third connecting plate 330 which are connected in sequence, and a folding line 3101, a folding line 3102, a folding line 3301 and a folding line 3302 which are arranged in sequence are arranged in parallel, one side of the first connecting plate 310 is connected with one side of the back plate 20 far away from the upper folding plate 10 through the folding line 3101, the opposite side is connected with the second connecting plate 320 through the folding line 3102, and the second connecting plate 320 is connected with the third connecting plate 330 through the folding line 3301. The lower folding plate 30 can be folded around the

folding lines

3301, 3102 and 3101 and forms a lower cavity 3 together with a portion of the back plate 20.

In the illustrated embodiment, the side edges of the first connecting plate 310 are further symmetrically provided with the insertion tongues 311 and the insertion tongues 312, and by providing the insertion tongues 311 and the insertion tongues 312, the lower cavity of the folded paperboard is better sealed after the folded paperboard is folded into the display packaging box.

In the illustrated embodiment, the third connecting plate 330 is further provided with a plurality of second fixing portions 331 for fixing the lower end of the display article 50.

Preferably, the second fixing portion 331 is disposed corresponding to the first fixing portion 133.

The second fixing portion 331 may be a circle, a square, an oval, a star, or any other shape as long as it can fix the lower end of the display article 50 by engagement.

In some embodiments, referring to fig. 4, the lower folding plate 30 is further provided with a fourth connecting plate 340 and a fifth connecting plate 350.

Specifically, the fourth connecting board 340 is connected to the side of the third connecting board 330 away from the second connecting board 320 by a folding line 3302, the fifth connecting board 350 is connected to the side of the fourth connecting board 340 away from the third connecting board 330 by a folding line 3501, after the cardboard is folded, the fourth connecting board 340 is located below the third connecting board 330, and the fifth connecting board 350 is fixed on the second connecting board 320 by glue, so as to provide a stable supporting function for the display article 50 clamped on the third connecting board.

Further, the fourth connecting plate 340 includes an auxiliary bonding portion 341 and a supporting portion 342, when folded, the auxiliary bonding portion 341 is fixed on the back plate 30 by glue, and the supporting portion 342 is disposed below the third connecting plate 330, so that the lower cavity 3 and the supporting portion 342 have more structural stability.

Further, referring to fig. 4, 6 and 7, a U-shaped cutting line 3403 and a folding line 3404 are disposed between the auxiliary bonding portion 341 and the supporting portion 342, the folding line 3404 is disposed in an intermittent line, and both ends of the folding line 3404 are connected to both ends of adjacent U-shaped cutting lines, so that the fourth connecting plate 340 can be bent along the folding line 3404 to be divided into two parts, i.e., the auxiliary bonding portion 341 and the supporting portion 342, after the carton is folded into the display packaging box and cut by the U-shaped cutting lines, a U-shaped protrusion is formed on the auxiliary bonding portion 341 and fixed on the back panel 20 together with the auxiliary bonding portion 341.

And the side wings 40 are used for closing the two ends of the upper cavity 1 and the lower cavity 3 after being folded and formed.

Specifically, the side flap 40 further includes a first side flap 41, a second side flap 42, a third side flap 43 and a fourth side flap 44, wherein the first side flap 41 and the second side flap 42 are symmetrically disposed at two ends of the folding line 1101, and the third side flap 43 and the fourth side flap 44 are symmetrically disposed at two ends of the folding line 3301.

Further, the first wing 41 includes a first wing a surface 411, a first wing B surface 412, a first wing C surface 413, and a first wing D surface 414, the first wing a surface 411 is connected to the back plate 20 via a pressing line 4113, is connected to the first wing C surface 413 via a pressing line 4112, and is connected to the first wing B surface 412 via a pressing line 4111, and the first wing D surface 414 is connected to the first flap 110 via a pressing line 4141, and is connected to the first wing C surface 413 via a folding line 4142. In the folding process of the first side wing 41, the first side wing C surface 413 and the first side wing D surface 414 can be folded inwards along the folding line 4142, the first side wing B surface 412 is inserted into the right end gap of the upper cavity 1, so that the first side wing 41 and the insertion tongue 131 cover the right end of the upper cavity 1 together, and under the folding action of the first side wing C surface 413 and the first side wing D surface 414, the first side wing a surface 411 and the first folding plate 110 are drawn close to each other, so that the right end of the upper cavity 1 has structural stability.

The second side wing 42 further includes a second side wing a surface 421, a second side wing B surface 422, a second side wing C surface 423, and a second side wing D surface 424, the second side wing a surface 421 is connected to the back plate 20 via a pressing line 4213, is connected to the second side wing C surface 423 via a pressing line 4212, is connected to the second side wing B surface 422 via a pressing line 4211, and the second side wing D surface 424 is connected to the first folded plate 110 via a pressing line 4241, and is connected to the second side wing C surface 423 via a folding line 4242. In the folding process of the second side wing 42, the second side wing C surface 423 and the second side wing D surface 424 can be folded inwards along the folding line 4242, the second side wing B surface 422 is inserted into the left end gap of the upper cavity 1, so that the second side wing 42 and the insertion tongue 132 cover the left end of the upper cavity 1 together, and under the folding action of the second side wing C surface 423 and the second side wing D surface 424, the second side wing a surface 421 and the first folding plate 110 are drawn close to each other, so that the left end of the upper cavity 1 has structural stability.

The third flank 43 further includes a third flank a surface 431, a third flank B surface 432, a third flank C surface 433, and a third flank D surface 434, the third flank a surface 431 is connected to the second connecting plate 320 via a pressing line 4313, is connected to the third flank C surface 433 via a pressing line 4312, and is connected to the third flank B surface 432 via a pressing line 4311, and the third flank D surface 434 is connected to the third connecting plate 330 via a pressing line 4341, and is connected to the third flank C surface 433 via a folding line 4342. In the folding process of the third side wing 43, the third side wing C surface 433 and the third side wing D surface 434 can be folded inwards along the folding line 4342, the third side wing B surface 432 is inserted into the right end gap of the lower cavity 3, so that the third side wing 43 and the insertion tongue 311 cover the right end of the lower cavity 3 together, and under the folding action of the third side wing C surface 433 and the third side wing D surface 434, the third side wing a surface 431 and the third connecting plate 330 are drawn close to each other, so that the right end of the lower cavity 3 has structural stability.

The fourth wing 44 further includes a fourth wing a-face 441, a fourth wing B-face 442, a fourth wing C-face 443, and a fourth wing D-face 444, the fourth wing a-face 441 is connected to the second connecting plate 320 by a pressing line 4413, the fourth wing C-face 443 by a pressing line 4412, the fourth wing B-face 442 by a pressing line 4411, and the fourth wing D-face 444 is connected to the third connecting plate 330 by a pressing line 4441, the fourth wing C-face 443 by a folding line 4442. In the folding process of the fourth side wing 44, the fourth side wing C surface 443 and the fourth side wing D surface 444 can be folded inwards along the folding line 4442, the fourth side wing B surface 442 is inserted into the gap at the left end of the lower cavity 3, so that the fourth side wing 44 and the insertion tongue 312 cover the right end of the lower cavity 3 together, and under the folding action of the fourth side wing C surface 443 and the fourth side wing D surface 444, the fourth side wing a surface 441 and the third connecting plate 330 are drawn close to each other, so that the left end of the lower cavity 3 has structural stability.

Referring to fig. 1 to 3, after the paper board of the present embodiment is folded, the first folded plate 110, the second folded plate 120, the third folded plate 130 of the upper folded plate 10 and a portion of the back panel 20 enclose an upper cavity 1, the first connecting plate 310, the second connecting plate 320, the third connecting plate 330 of the lower folded plate 30 and a portion of the back panel 20 enclose a lower cavity 3, the first side wing 41 is folded to cover the right end of the upper cavity 1, the second side wing 42 is folded to cover the left end of the upper cavity 1, the third side wing 43 is folded to cover the right end of the lower cavity 3, the fourth side wing 44 is folded to cover the left end of the lower cavity 3, the upper cavity 1 obtains structural stability through the first side wing 41 and the second side wing 42, and the lower cavity 3 obtains structural stability through the third side wing 43 and the fourth side wing 44. A predetermined distance is left between the upper cavity 1 and the lower cavity 3 to form a display part 2.

When the display article 50 is placed in the display packaging box, the upper end thereof is fixed by the first fixing portion 133 in a clamping manner, the lower end thereof is fixed by the second fixing portion 331 in a clamping manner, the bottom thereof is in contact with the first connecting plate 310, and the main body portion is exposed on the display portion 2, thereby obtaining the display effect.

It is understood that in other embodiments, the insertion tongue 131, the insertion tongue 132, the insertion tongue 311, the insertion tongue 312, the first fixing portion 133 and the second fixing portion 331 may be omitted.

Referring to fig. 4 to 9, after the paper board of the present embodiment is folded, the first folded plate 110, the second folded plate 120, the third folded plate 130 of the upper folded plate 10 and a portion of the back panel 20 enclose an upper cavity 1, the fourth folded plate 140 extends along the direction of the back panel 20, the tongue 141 is inserted into the top of the lower cavity 3, the first connected plate 310, the second connected plate 320, the third connected plate 330 of the lower folded plate 20 and a portion of the back panel 20 enclose a lower cavity 3, the auxiliary adhesive portion 341 of the fourth connected plate 340 is fixed on the back panel 20 by glue, the supporting portion 342 is disposed below the third connected plate 330, the fifth connected plate 350 is fixed on the second connected plate 320 by glue, after the first side wing 41 is folded, the right end of the upper cavity 1 is covered, after the second side wing 42 is folded, the right end of the lower cavity 3 is covered after the third side wing 43 is folded, and after the fourth side wing 44 is folded, the left end of the lower cavity 3, the above structure further enhances the structural stability of the packing box. A predetermined distance is left between the upper cavity 1 and the lower cavity 3 to form a display part 2.

When the display article 50 is placed in the display packaging box, the upper end of the display article is clamped and fixed by the first fixing portion 133, the lower end of the display article is clamped and fixed by the second fixing portion 331, and the bottom of the display article is in contact with the supporting portion 342, so that the display effect is achieved, and meanwhile, the display article 50 obtains excellent impact resistance.

Above-mentioned cardboard, folding plate 10, backplate 20, folding plate 30 and flank 40 integrated into one piece down on it can be directly through simple folding formation show packing carton, and the show packing carton after folding has higher stability under the support of flank, utilizes the small-size show packing carton of above-mentioned cardboard preparation, stable in structure, low cost, and product environmental protection.

Above-mentioned show packing carton, backplate 10, upper chamber body 1, lower chamber body 2 and flank 40 are folded by integrated into one piece's paper material and are made, stable in structure, low cost, and the material environmental protection.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A paperboard is used for being assembled to form a display packaging box and is characterized by comprising an upper folding plate (10), a back plate (20), a lower folding plate (30) and side wings (40), wherein one end of the back plate (20) is connected with the upper folding plate (10), the other end of the back plate (20) is connected with the lower folding plate (30), each side wing (40) comprises a first side wing (41), a second side wing (42), a third side wing (43) and a fourth side wing (44), the first side wing (41) and the second side wing (42) are respectively arranged at two opposite sides of the connecting end of the upper folding plate (10) and the back plate (20), and the third side wing (43) and the fourth side wing (44) are respectively arranged at two opposite sides of the connecting end of the lower folding plate (30) and the back plate (20);

go up folded sheet (10) with cavity (1) is gone up in backplate (20) collapsible one-tenth, folded sheet (30) down with cavity (3) under backplate (20) collapsible one-tenth, after folding, first flank (41) and second flank (42) cover respectively go up the both ends of cavity (1), third flank (43) and fourth flank (44) cover respectively the both ends of cavity (3) down, go up cavity (1) with leave predetermined distance down between cavity (3).

2. The blank of claim 1, wherein the upper folding panel (10) comprises a first flap (110), a second flap (120), and a third flap (130) connected in series, the first flap (110) being connected to the back panel (20).

3. The blank of claim 2, further comprising a fourth flap (140) and a tab (141), the fourth flap (140) being connected to a side of the third flap (130) remote from the second flap (120), the tab (141) being disposed on a side of the fourth flap (140) remote from the third flap (130).

4. The cardboard of claim 2, wherein the lower folding plate (30) comprises a first connecting plate (310), a second connecting plate (320) and a third connecting plate (330) connected in sequence, the first connecting plate (310) being connected with the back plate (20).

5. Cardboard according to claim 4, further comprising a fourth connecting plate (340) and a fifth connecting plate (350), the fourth connecting plate (340) being connected to a side of the third connecting plate (330) remote from the second connecting plate (320), the fifth connecting plate (350) being connected to a side of the fourth connecting plate (340) remote from the third connecting plate (330).

6. Cardboard according to claim 5, characterized in that the fourth web (340) further comprises an auxiliary adhesive portion (341) and a support portion (342).

7. The blank according to claim 4, wherein the third flap (130) is provided with a plurality of first fixing portions (133), the third connecting plate (330) is provided with a plurality of second fixing portions (331), and after folding, the first fixing portions (133) correspond to the second fixing portions (331) in position and number.

8. A display pack made of the paperboard of any one of claims 1 to 7, comprising:

a back plate (20);

the upper cavity (1) is formed by encircling the back plate (20) and an upper folding plate (10), the upper folding plate (10) comprises a first folded plate (110), a second folded plate (120) and a third folded plate (130) which are sequentially connected, and the first folded plate (110) is connected with the back plate (20);

the lower cavity (3) is formed by encircling the back plate (20) and a lower folding plate (30), the lower folding plate (30) comprises a first connecting plate (310), a second connecting plate (320) and a third connecting plate (330) which are sequentially connected, the first connecting plate (310) is connected with the back plate (20), and a preset distance is reserved between the upper cavity (1) and the lower cavity (3); and

the side wing (40) comprises a first side wing (41), a second side wing (42), a third side wing (43) and a fourth side wing (44), the first side wing (41) and the second side wing (42) respectively cover two ends of the upper cavity (1), and the third side wing (43) and the fourth side wing (44) respectively cover two ends of the lower cavity (3).

9. Display pack according to claim 8, further comprising a fourth flap (140) and a tongue (141), the fourth flap (140) being connected to the side of the third flap (130) remote from the second flap (120), the tongue (141) being provided on the side of the fourth flap (140) remote from the third flap (130), the tongue (141) being connected to the lower cavity (3).

10. Display pack according to claim 8, further comprising a fourth connecting panel (340) and a fifth connecting panel (350), the fourth connecting panel (340) being connected to the third connecting panel (330) on the side remote from the second connecting panel (320), the fifth connecting panel (350) being connected to the fourth connecting panel (340) on the side remote from the third connecting panel (330).